I guess you cant read the rest for the link.
In an update to the original article PayPal had this to say;
BI: Are you using OpenStack in addition to other cloud tech like VMware’s? Are you using it instead of VMware?
PayPal: VMware provides important technologies for PayPal’s platform. However, we do leverage a few cloud technologies including OpenStack, VMware and Red Hat so that we can architect our infrastructure to enable choice and deliver agility for our business.
BI: Is this an experiment or is it production?
PayPal: PayPal’s OpenStack project is already in production.
BI: How big a commitment have you made to OpenStack? Are you eventually using it on all your servers? Some of them?
PayPal: PayPal’s strategy is to leverage open source products and provide meaningful insight and contribution to help advance the ecosystem. OpenStack is one of the key projects in this overall strategy.
UPDATE: We have heard from Adrian Ionel, the CEO of Renski's company Mirantis, who says that Renski is "exaggerating the use case" of OpenStack at PayPal and that Renski's "knowledge of the project is second hand and therefore limited."